1997A&AS..124..189O -
Astron. Astrophys., Suppl. Ser., 124, 189-196 (1997/July-0)
Absolute stellar proper motions with reference to galaxies of the M 81 group.
ODENKIRCHEN M., BROSCHE P., BOERNGEN F., MEUSINGER H. and ZIENER R.
Abstract (from CDS):
We report on the measurement of absolute proper motions of stars of magnitude 7 to 14.5 in a 2x2° field in the region of the M 81 group of galaxies. This work is part of the Bonn program for the extragalactic link of Hipparcos. The proper motions were determined from a collection of photographic plates covering the time interval from 1894 to 1994. The absolute reference system for the proper motions is represented by the galaxies M 81, M 82 and NGC3077, for which accurate optical reference positions were obtained by means of an image cross-correlation technique. For the majority of stars, the internal proper motion accuracy is better than 1mas/a. The precision of the realization of the absolute system is found to be around 1mas/a. In total, our measurements yield absolute proper motions for 24 Hipparcos stars and positions, proper motions and photometry for 330 additional stars including a number of visual binaries and high proper motion stars. Among the latter one G-type subdwarf is identified. The results are relevant as a contribution to the Hipparcos link, but also as a database for kinematic investigations.
Abstract Copyright:
∼
Journal keyword(s):
galaxies: individual: M 81 - astrometry - reference systems - catalogs
Nomenclature:
Table 5: [OBB97] 5-NA (Nos 1A-8A, 1B-8B). Table 6: [OBB97] 6-N (Nos 1-8)
Simbad objects:
46
View the references in ADS